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Re:Ruby basics (1 viewing) (1) Guest
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TOPIC: Re:Ruby basics
#4415
ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
Character Encoding


The default character set for Ruby is ASCII, whose characters may be represented by single bytes.

If we use UTF-8, or another modern character set, characters may be represented in one to four bytes.
 
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#4416
ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
String Built-in Methods:

We need to have an instance of String object to call a String method.


Following is the way to create an instance of String object:


new [String.new(str="")]
 
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#4417
ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
Following is the way to create an instance of String object:

new [String.new(str="")]


This will returns a new string object containing a copy of str.

Now using str object we can all any available instance methods
 
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#4418
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
Lets understand some of the public String methods

.We are assuming that str is a String object .

1. str % arg


Formats a string using a format specification. arg must be an array if it contains more than one substitution.
 
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#4419
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
2. str * integer

Returns a new string containing integer times str. In other words, str is repeated integer imes.


3 str + other_str

Concatenates other_str to str.
 
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
4. str << obj

Concatenates an object to str. If the object is a Fixnum in the range 0.255, it is converted to a character. Compare it with concat.


5 str <=> other_str

Compares str with other_str, returning -1 (less than), 0 (equal), or 1 (greater than). The comparison is casesensitive.
 
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